Marcus Simmons's Stars of Tomorrow

AUTOSPORT's Marcus Simmons scours the junior single-seater ranks to pick out six youngsters making big waves on the path to Formula 1

Matthew Brabham

When the names Brabham and Andretti join forces, you're never going to expect an anonymous run in the midfield.

So it's proved in the Pro Mazda series in the US this season, with Matthew Brabham – grandson of three-time world champion Jack and son of former Le Mans 24 Hours winner Geoff – winning four of the first five races with the Andretti Autosport team.